Which is the major product expected from the following S_N² reaction?

1.      

2.     

3.     

4.    

 $C{H}_3$
$|$
$C{H}_3—C—C{H}_3$
$|$
$Br$
        (a)

CH₃-CH-CH₃
         l
        Br
        (b)   

CH₃-CH-Br     
       (c)

Compare rate of E₂ reaction:-
(1)c>b>a

(2)a>b>c

(3)b>a>c

(4)c>a>b
           

Which is the major product of the following reaction?

 $\underset{H_{2}O}{\overset{}{\to }}$
$heatNaOH Product$

1. 

2. 

3. 

4. 

1-2-dichloro ethane + NaSCH₂CH₂SNa $\to$ P (C₄H₈S₂) 

Unknown product (p) of the above reaction is:

1. 

2. 

3. $\mathrm{H}-\mathrm{S}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{S}-\mathrm{H}$

4. $\mathrm{H}-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{S}-\mathrm{H}$

 $\stackrel{\mathrm{KCN}}{\to }$  Product of reaction is:

 (MOM chloride)

(Methoxy methyl chloride)

1. 

2. 

3.  $Me-O-C{H}_2-C{H}_2-CN$

4. $CN -C{H}_2-CN$

In order to prepare 1-chloropropane, which of the following reactants can be employed?
(1) Propane and HCl in the presence of peroxide

(2) Propene and Cl₂ followed by treatment with aq. KOH

(3) Propanol-1 and SOCl₂/pyridine

(4) Any of the above can be used

Which of the following molecules would have a carbon-halogen bond most susceptible to nucleophilic substitution ?

(1) 2-Fluorobutane

(2) 2-Chlorobutane

(3) 2-Bromobutane

(4) 2-Iodobutane

When benzyl chloride is treated with ethanolic KCN, the major product formed is:-
(1) benzyl ethyl ether

(2) benzyl alcohol

(3) benzyl cyanide

(4) benzyl isocyanide

Ethyl bromide reacts with lead-sodium alloy to form:-

(1) tetraethyl lead

(2) tetraethyl bromide

(3) both (1) and (2)

(4) none of these

Grignard reagent shows addition on:

1. >C=O

2. -C$\equiv$N

3. >C=S

4. all of these